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    <title>HTML学习指南</title>
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<table id="title" border="2">
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            <th id="title1" colspan="3"><h1>HTML学习课程表</h1></th>
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    <tbody>
        <tr>
            <th>day<span>1</span></th>
            <td><h3>了解HTML5语法</h3></td>
        </tr>
        <tr>
            <th>day<span>2</span></th>
            <td><h3>了解HTML5标签属性</h3></td>
        </tr>
        <tr>
            <th>day<span>3</span></th>
            <td><h3>了解HTML5标签嵌套</h3></td>
        </tr>
        <tr>
            <th>day<span>4</span></th>
            <td><h3>常用的HTML5标签（一）</h3>
                <ul>
                    <li>div</li>
                    <li>p</li>
                    <li>h1-h6</li>
                    <li>img</li>
                    <li>a</li>
                    <li>b</li>
                    <li>br</li>
                    <li>button</li>
                    <li>hr</li>
                    <li>span</li>
                    <li>em</li>
                    <li>fieldset</li>
                    <li>legend</li>
                </ul>
            </td>
        </tr>
    <tr>
        <th>day<span>5</span></th>
        <td><h3>常用的HTML5标签（二）</h3>
            <ol>
                <li><h4>Unordered list</h4>
                    <ul class="label">
                        <li>ul</li>
                        <li>li</li>
                    </ul>
                </li>
                <li><h4>Orderly list</h4>
                    <ul class="label">
                        <li>ol</li>
                        <li>li</li>
                    </ul>
                </li>
                <li><h4>Definition list</h4>
                    <ul class="label">
                        <li>dl</li>
                        <li>dt</li>
                        <li>dd</li>
                    </ul>
                </li>
            </ol>
        </td>
    </tr>
    <tr>
        <th>day<span>6</span></th>
        <td><h3>常用的HTML5标签（三）</h3>
            <ol>
                <li><h4>table常用标签</h4>
                    <ul class="label">
                        <li>table</li>
                        <li>tr</li>
                        <li>td</li>
                    </ul>
                </li>
                <li><h4>table行组合</h4>
                    <ul class="label">
                        <li>thead</li>
                        <li>tbody</li>
                        <li>tfoot</li>
                        <li>th</li>
                        <li>td</li>
                    </ul>
                </li>
            </ol>
        </td>
    </tr>
    <tr>
        <th>day<span>7</span></th>
        <td><h3>常用的HTML5标签（四）</h3>
            <ul>
                <li>form</li>
                <li>input</li>
                <li>select</li>
                <li>option</li>
            </ul>
        </td>
    </tr>
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